di-shan-utils
Version:
JavaScript 函数库、工具类
16 lines (13 loc) • 353 B
JavaScript
/* eslint-disable valid-typeof */
var staticStrUndefined = require('./staticStrUndefined')
/**
* 判断是否WeakMap对象
*
* @param {Object} obj 对象
* @return {Boolean}
*/
var supportWeakMap = typeof WeakMap !== staticStrUndefined
function isWeakMap (obj) {
return supportWeakMap && obj instanceof WeakMap
}
module.exports = isWeakMap